PCB孔插针机控制系统的设计与研究

Design and Study of Control System of PCB Hole Insertion Machine

为了解决传统PCB板手工插针的难度及效率问题,研究一套基于三菱PLC与威纶触摸屏的控制系统。控制系统采用步进电机驱动滚珠丝杠并带动工作台(X-Y平台)运动,通过光电开关检测滚珠丝杠沿X轴方向、Y轴方向的极限位置,并将信号实时反馈给PLC进行处理。插针机构控制部分通过接近开关检测气缸伸出与缩回位置并驱动电磁阀动作,当插针顺利落入插针孔内,通过顶针连续将插针打入对应PCB孔内。该系统配有视觉识别系统,通过相机光源实时拍照采集数据图像,并传送给工业控制机进行处理并对照显示,通过与合格标准样件进行对比,工人能很快发现PCB孔插针的正确与否。实践应用证明,该系统符合工业现场生产要求,可靠性高,稳定性好。

In order to solve the difficulty and efficiency of traditional PCB, a set of control system based on Mitsubishi PLC and WEINVIEW HMI was designed. Control system adopts stepper motor to drive the ball screw and drive the workbench（x-y platform） movement, through the photoelectric switch to detect the ball screw along the X axis and Y axis of the limit position, and real-time feedback signal to PLC for processing. Pin mechanism control part through proximity switch test cylinder extended and retracted position and drive solenoid valve movement, when the pin insert into the pinhole smoothly, through the thimble continuous pin into the corresponding PCB hole. The system is equipped with a visual identification system, through the camera light source image real-time photo collection data, and transmit to the industrial control machine for processing and display, through comparing with standard sample, the workers can quickly find the PCB hole pin correctly or not. The practical application proves that the system is in line with the requirements of industrial production, with high reliability and good stability.